Since in the HTML language all web sites are enclosed by the HTML tag, you can extract a complete website including all HTML tags using
EXTRACT POS=1 TYPE=HTM ATTR=<HTML*
This can be very useful if you need to do your own parsing of the web site's contents.
To return only the body (main content) of a web page you can use
EXTRACT POS=1 TYPE=HTM ATTR=<BODY*
Page URL http://www.iopus.com/imacros/help/extract_complete_website.htm